Upp An unknown white powder have been seized by the police on the country border. Thechemical analysis is yet to be performed. Although the powder is suspected to be aprecursor for an explosive, there is no preliminary information on whether it has organic,inorganic or metallic composition.CUSTOMSFigure 1.Image of the seized powder.(a) You are asked to propose an analytical strategy to establish whether the powder isconsistent with explosive.Your proposal should include:(i) The sequence that the techniques and sample manipulation steps will beapplied including decision gates etc. (you might wish to illustrate thissequence with a flow diagram).(ii) A brief justification for using each of the proposed techniques in the context ofthis analysis.

Step 1:Analyzing an unknown white powder suspected of containing explosives requires a systematic…

Answered: An unknown white powder have been…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The following chart summarises analytical procedures that were followed in the course of determining the molecular formula and the structure of an organic compound A and also the results obtained. Study the chart and answer the questions that follow: (a) Briefly describe the chemical procedure for establishing the presence of chlorine in A. (b) Briefly outline the principles of the mass spectrometer involved in using it to determine the molecular mass of A. Hence suggest structures for A, B, C & D
1. Match the terms given in Column I with the compounds given in Column II. Column I (i) Acid rain(ii) Photochemical smog(iii) Combination with haemoglobin(iv) Depletion of ozone layer Column II (a) CHCl2 – CHF2(b) CO(c) CO2(d) SO2(e) Unsaturated hydrocarbons
(a) A sample of aspirin (acetyl salicyclic acid) of molecular mass 180, on analysis was found to contain60% carbon, 4.4% hydrogen and 35.6% oxygeni.Determine the empirical formula of aspirinii. What is the molecular formula of aspirin?iii. State the technique that can be used to determine the molecular weight of aspirinb) i. Given the structure of all the isomers of a compound with molecular formula C3H6Cl2ii. Which structure(s) in b(i) is(are) optically active?
"After standardization, silver nitrate must be stored in amber bottle and at room temperature with proper ventilation." True False
1. Your company manufactures and markets an enriched all-purpose flour product. You purchase a premix con- taining elemental iron powder, riboflavin, niacin, thi- amin, and folate which you mix with your flour during milling. You specified to the supplier that the premix be formulated so that when added to flour at a spec- ified rate, the concentration of added iron is 20mg/lb flour. However, you have reason to believe that the iron concentration in the premix is too low so you decide to analyze your enriched flour using your new atomic absorption spectrometer. Current FDA guidelines for enriched flour specify that the iron concentration should be 20 mg/lb: http://www.accessdata.fda.gov/scripts/ cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=137.165 (accessed 6/18/2009). You follow the following protocol to deter- mine the iron concentration. (a) Weigh out 10.00 g of flour, in triplicate (each replicate should be analyzed separately). (b) Transfer the flour to an 800-ml Kjeldahl flask. (c) Add…
What are the a.) source (natural)synthetic of raw materials b.) method of separation/chemical reaction (with brief process) of the raw materials: calcium polysulphide and hydrochloride acid with yield of precipitated sulfur? As also shown in the attached image
THE ROLE OR IMPART OF INORGANIC PHARMACEUTICAL TO PHARMACY.
dont provide handwriting soluton.....
b) Copy and complete the table below, identifying one analytical technique, different in each case, that can be used to obtain the following information indicated. Information required Analytical technique Relative atomic mass of an element (Ar) The functional groups and strength of bonds in an organic compound The detailed structure of an organic molecule (without degrading the sample) (c) Describe what happens on a molecular level when hydrogen sulfide molecules absorb infrared radiation. (d) Explain the following observations: i. The absorptions obtained from 1H NMR spectroscopy occur at much lower frequencies than those obtained from IR spectroscopy. ii. Hydrogen bromide is infrared active whereas bromine is infrared inactive. (e) Wavenumbers are the most common unit used to specify infrared absorptions. State the relationship between wavenumber and wavelength, and show how wavenumber is related to energy. (f) Explain why stretching frequencies decrease…
cable below you will find three descriptions of sclentists engaging In activitles that are part of the sclentifi description missing word? Carl records In his lab notebook the powder In a test tube, the powder melts into a silvery liquld that welghs less than the original powder. that when he heats a red Antolne develops a idea that most substances will chemnically combine with an invisible gas in the atmosphere he calls oxygen. Antoine uses hls ideas to explain burning as the comblnation of a substance with oxygen, and reduction (e.g. durlng che formation of iron from iron ore) as the splitting of a substance from a chemical combination with oxygen. for chemical reactions based around the ohn analyzes all the known compounds of carbon and oxygen. He finds nd writes down a that says the ratio of masses of carbon that combine with 100 g of oxygen in these compounds are always in whole umber ratios (e.g. 2:1 or 3:1).
Calculate the Molecular formula of A. Briefly describe the chemical procedure for establishing the presence of Chlorine in A. Briefly outline the principles of the mass spectrometer involved in using it to determine the molecular mass of A. Hence suggest structures for A, B, C, & D.
Note:- • Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. • Answer completely. • You will get up vote for sure.

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